Electrical speed-change control apparatus



Aprii 3, 3943., E. H 2,23%,746

ELECTRICAL SPEED-CHANGE CONTROL APPARATUS Filed May 26, 1958 5 Sheets-Sheet l I NVE NTOR EUGENE S. BUS H mfwmw ATTORNEY April 1, 394?. E. s. BUSH ELECTRICAL SPEED-'"HANGB CONTROL APPARATUS Filed May 26, 1938 5 Sheets-Sheet 2 wt 3 wi \Q April 1, 1941. E. s. BUSH ELECTRICAL SPEED-CHANGE CONTROL APPARATUS 5 Sheets-Sheet 4 Filed May 26, 1938 INVEN TOR EUGENE S. BUSH BM ATTORNE ELECTRICAL SPEED-CHANGE CONTROL APPARATUS Filed May 26, 1938 5 Sheets-Sheet ,5

FIG.21.

17 {T 7E 30 P508 30%: k [L 1' r [-328 [E329 ./Z9'3 Pal? I T 5/ l 2% Q 277 278 2% INVENTOR Z70 EUGENE S. BUSH BY W ATTORNE Patented Apr. 1, 1941 UNITED STATES PATENT ELECTRICAL SPEED-CHANGE CONTROL APPARATUS 23 Claims.

This invention relates to electrical speedchange control apparatus, and more particularly to speed-change mechanism of electromagnetic type, which is selectively manually or automatically controlled and adapted for operative association with a multi-speed power transmission assembly such as employed in automotive vehicles.

A general object of the invention, broadly stated, is an improved electromagnetic device for general application to the control of associated apparatus requiring a compound control movement, or particularly, a control movement in different planes.

Yet another object, akin to the foregoing, is attained in an electromagnetic device capable of producing, selectively, rotatory movements and axial movements, and hence adapted to effect, for example, either a to-and-fro, or a side-to-side type of movement, if desired, of a common control member of adjunctive devices to be controlled. The ensuing objects, are, for better understanding, expressed with respect to the control of an automotive speed-change transmission, but are to be understood as applicable in most instances, to the utilization of the invention for other control purposes.

An object of the invention is to provide a compact, yet efiiclent and positively-acting speedchange mechanism for automotive transmission assemblies and the like, the mechanism being of electromagnetic type and operated selectively by manual control means conveniently arranged for operator accessibility, or by automatically func tioning control means, as a speed-responsive device infiuenced by automotive vehicle speeds.

Another object is attained in the provision of an electromagnetic gear-shifter or speed-change device for automotive vehicles, which is adapted for ready and easy application to transmission assemblies of the general type utilized in exist ing types of such vehicles, and further which. is formed as a compactunit requiring but a minimum of space for mounting in operative association'with the transmission assembly.

A further object resides in .the provision of a speed-change control device for the purpose noted, adapted for operative connection, for example, to the gear-shift member of an automotioning'automatically in response to vehicle speed,

and means for rendering operative either control means to the exclusion of the other.

Yet another object is to provide a gear-shift device and selective control means therefor, comprised of relatively few parts related in a compact manner, the device being of electromagnetic type and including relatively movable armature members which cooperate in effecting the gear shifting function of the device.

Yet a further object is to provide in a device of the type'described, an electromagnetic field assembly, and cooperating armature assemblies adapted for axial displacement as a unit, in response to energization of the field assembly, the

. armatures being operatively related such that one thereof is adapted for rotary movement relative to the other, in response to energization of the armature windings on the latter armature, the axial displacement of the armatures as a unit and the rotary movement of one relative to the other being utilized in effecting the gear shifting function of the device in a manner to simulate the shifting motion or a prevalent type of standard gear shift assembly.

Further objects and advantages will readily appear as the description proceeds, and from the accompanying drawings, in which:

Fig. 1 is a fragmentary elevation of the instrument board and foot board zone of an automotive vehicle, in which are located the steering and control apparatus therefor, the view illustrating the speed change or gear-shifting device forming the subject of the invention, as positioned on the foot board and in operative association with the gear-shifting lever of the transmission assembly; Fig. 2 is a partly sectional side elevation of the assembly shown by Fig. 1, as viewed from line 22 in Fig. 1; Fig. 3 is an enlarged plan view of a manual control means for the shifter device, shown as mounted on the steering column, the plan view of the control beby Fig. .3, as viewed along line 5-5 therein; Fig.

6 is an enlarged sectional view of a clutch-actuated control switch utilized in the control of the gear-shift device, the section being taken along line 6-6 in Fig. 2; Fig. '7 is a greatly enlarged, longitudinal section of the gear-shifter device, shown in operative association with the gearshift member of the transmission, the view being taken along line 'l---! in Fig. 1; Fig. 8 is a transverse section through one end of the device, as

taken along line 88 in Fig. 7; Fig. 9 is a transverse section of the device near the opposite end thereof, as viewed from line 9-9 in Fig. '7; Fig.

10 is a further transverse sectional elevation of the device shown as mounted on the foot board and in operative connection to the gear-shift member of the transmissionassembly, the view being taken along line Ill-4i! in Fig. 7; Figs. 11 and 12 are further transverse sections of the device, as taken respectively, along lines llll and 12-12 of Fig. 7; Fig. 13 is a longitudinal section of one end portion of the device, illustrating certain switch controls therefor, the view being taken along line l3-l3 in Fig. 7; Figs. 14 and 14A are companion figures illustrating diagrammatically the positions of the operative elements of the device when actuated for effecting a reverse condition of a standard speed-change transmission; Figs. 15 and 15A are similar diagrams showing positions of parts of the control assembly corresponding to a first speed transmission setting; Figs. 16 and 16A are similar showings corresponding to second speed transmission setting; Figs. 17 and 17A similarly illustrate the parts of the control assembly in positions to effect a third speed transmission setting; Fig. 18 is an enlarged section through a speed-actuated control mechanism for the gearshifter device, as viewed from line !8l8 in Fig. 2; the mechanism being shown as driven from a gear on the vehicle drive shaft; Fig. 19 is a transverse section through the vehicle speed responsive control mechanism, as viewed from line l9l9 in Fig. 18; Fig. 20 illustrates .a control switch associated with and actuated by the vehicle-speed responsive mechanism, the view thereof being taken along line 2ll2[l in Fig. 19; Fig. 21 illustrates the circuit connections including a general wiring diagram of the device and its control elements, and Fig. 22 illustrates, principally in section. a preferred form of circuitclosing switch adapted for actuation by the accelerator pedal of the vehicle,

Referring now to the drawings by suitable characters of reference, the electromagnetic gearshifting device indicated generally at I'D (Figs. 1 and 2), which in association with control mech anism therefor, constitutes the subject of the present invention, is shown as applied to a multisoeed power transmission assembly ll of a type adapted for ap lication to automotive vehicles and the like. In the present example and for illustrative purposes only, a ortion of an automotive vehicle is shown in Figs. 1 and 2', as the fly-wheel end of the vehicle driving unit or engine l2, to which is coupled the transmission assembly l I vehicle drive shaft l3; steering wheel l4 and its shaft column !5: clutch lever I6 and its foot pedal ll; brake pedal I8 and foot accelerator l9. Also shown in fragmentary part, is instrument board 20, cowl 2|, foot board 22 and the floor board structure 23. The clutch lever. as well as the brake lever and foot accelerator, extend upwardly throu h a suitable aperture in foot board 22, to provide for ready operator-accessibility thereto, while the housing 24 for the transmission gear shift lever, modified as is hereinafter described, extends upwardly through the floor board 23.

Although the invention is at times designated by purpose as a gear shifting device, or shifter, it is to be understood as applicable, in a broad sense, to other special control purposeswhether or not associated with a gear-type transmission,

or with a transmission involving shiftable gears or the like, or one of constant-mesh type.

Turning now to the electromagnetic control operator device l0, shown in detail in Figs. 7 through 13, the device comprises a supporting frame 25 (Fig. 10) of a suitable material, as cast iron, formed to provide an arcuate seat or saddle portion 21 for the reception of a cylindrical member or case 28, secured thereto as by the screws 29. Frame 26 is mounted on foot board 22 adjacent the shift lever housing 24 (Figs. 1, 2 and 10), being secured thereto by suitable bolts or screws 3!].

Cylinder 28 is formed by preference, of a suitable nomnagnetic metal or other material, and has its ends closed by end plates or discs 3! and 32 which may be of the same material as the cylinder, the discs being secured to the cylinder by screws 33 (Fig. 7). Disposed concentrically within the cylinder 28, and secured to the end plate 3| as by screws 3 is a cylindrical, cupshaped element 35, the external diameter of which is somewhat less than the internal diameter of cylinder 28, for a purpose later to appear. A similar cup-shaped element 35 is supported in like manner, on the opposite end plate 32, both of these elements, by preference, being formed of a non-magnetic metal, although they may be of other suitable material. A relatively thinwalled cylinder 31 formed of insulating material and substantially coextensive in length with the cylinder 28, is disposed therein with its ends sleeved upon the elements 35 and 36 (Fig. '7). Supported in part by the cylinder 31 and occupying the space between the cylinder and an insulating lining 3B sleeved within the outer cylinder 28, is a winding structure 39 comprised of a central, relatively long coil section 48, a pair of relatively short coil sections ll and 32 arranged closely adjacent that end of the central coil nearest the end plate 3|, and a similar pair of coil sections 43 and M closely adjacent the opposite end of coil M1. The winding structure 39, while of an overall length less than that of the cylinder 28, is of such longitudinal extent as to exceed slightly, the longitudinal distance between the wall portions 45 and 45 of elements 35 and 36 respectively, this for a purpose later more fully appearing. The coil sections are electrically connected in series as will later appear, the connec: tions between coils til-M, 4l-d2, 40l3 and l344 being tapped respectively by leads 41, 48, 49 and 58, while the end turns of coils 42 and 44 are connected respectively, to leads 5| and 52. The circuit connections of the several electrical leads and conductors will be described later in connection with the wiring diagram of Fig. 21. However, it is to be noted here that the winding 39 comprises the energizing agency for the electromagnetic elements of the device, now to be described.

Disposed within insulating cylinder 31 and between the walls t5 and 46 of elements 35 and 36, is an armature core 53 of annular form comprised of suitable magnetic material and provided with two pairs of diametrally opposed salient poles or polar projections 54 and 54a directed internally thereof, which are angularly displaced by degrees (Fig. 11).

The winding arrangement associated with the opposed, paired salient polar projections has been selected for present description because ofgreater ease of reference and understandin however it will appear from later descriptionthat adis tributed type of winding may be utilized ina cir-' cuit arrangement readily adaptable by those skilled in the electrical arts.

In the example disclosed, the longitudinal extent of the poles is less than that of the core, to provide end space for armature windings '55 secured about poles 54, and windings 55a about the poles m. Secured to each end of the core as by screws 56, is a disc 5'! provided with a plurality of longitudinally projecting pins 58 which slidably seat in apertures 5Q provided therefor in the peripheral portion of the adjacent elements 35 and 35. These pins engaging in the slots 59, serve operatively to support the armature assembly, and further serve to prevent rotative movement of the assembly. As shown by Fig. 7, the longitudinal extent of the core assembly is less than the distance between the Walls 45 and it of elements 35 and 35, the arrangement being such that through the pin and slot provision, the core assembly may be displaced longitudinally in either direction, such movement being limited only by abutment of a core disc with the wall 45 or 66 of the adjacent element 35 or .35. The longitudinal movement of the core assembly is utilized in a manner later appearing, for effecting, in cooperation with other operative elements, speed-change shifting of the transmission gearing.

Located concentrically within the above described armature core and substantially axially coextensive therewith, is a second or inner armature core element '59 formed of magnetic material. The core is longitudinally grooved or notched as at 85, on opposite sides thereof, and the end portions 62 are also notched or cut-away, as at $3, the rooves and end notches providing space for an armature winding iii. The inner armature which appears as a two-pole element, is adapted for rotary movement relative to the outer armature core 53, being rotatively supported by a pair of flanged shaft elements (35 and 66, the shaft 65 being operatively connected through its flange, on one end of the core, as by the screws iil, having its shaft portion extended through the end plate 5? of armature core 53, and through the wall 45 of element 35. The end plate 5'! and wall 45 serve as bearing supports for the shaft, as will be observed from 7. The other shaft 66 is similarly secured to the opposite end of core (ill, and extends through the opposite end plate El of core 53, wall of element 35 and thence through an opening 58 provided therefor in the plate 32, the shaft extending outwardly beyond the latter plate for a purpose later appearing. The plate 5'. and wall 36 serve as hearing supports for the shaft. It will be observed that portions of the shaft flanges abut the end plates 5? of core assembly 53, thus precluding axial displacement of core 89 relative to core but providing for axial movement thereof with core 53 when the latter is moved, so that the two core assemblies are 1ongitudinally displaceable as a unit. Moreover, through the supporting shaft elements, the inner core 33 is adapted for rotary movement relative to the outer core 53, and such movement of the inner core is employed through means now to be described, for effecting certain operations in the function of the device to shift the transmission gearing.

An eccentric disc $9 is operatively secured upon the end portion of shaft 65 located within the element 35, the shaft end being shouldered to receive the disc, while a similar eccentric disc ltl is likewise secured to a shouldered portion H of the opposite shaft 66, the shaft portion H and disc 10 being located within the element 38. It is a preference in the present example operatively to connect the eccentrics to the shafts in the manner illustrated in Fig. 10 for the eccentric l0 and its shaft 68. The eccentric disc is provided with a shaft seat Ha; an arcuate slot 'Hc preferably formed as an integral part of the shaft, and a pair of compression, springs lid, one on each side of the finger, and being arranged between the finger and one end of the slot, (Fig. 10). Thus there is provided a somewhat resilient, lost motion drive connection between the shaft and eccentric. Since the eccentrics constitute operating elements for effecting transmission gear shifting by the device, as will later appear, the springs serve to absorb shock attending the speed-change or shifting function of the mechanism.

A U-shaped or forked member 12 is arranged externally of the case 28, with its arms 73 extended laterally through end slots 74 in case 23, slots T5 in cylinder 3? and slots 16 in elements 35 and 35, to the interior of the latter elements, in the manner shown by Figs. '7 and 10. The ends of the arms it? are formed to provide eccentric straps ll, one of which is operatively secured to eccentric 69 while the other is similarly secured to eccentric 79. The manner of securement in each instance is such as to cause the straps to follow both the rotary movement of the eccentrics and the axial displacement thereof, the latter effected by axial displacement of the armature core assemblies 53 and Gil moving as a unit, and the former by rotary movement of core 59 alone. As a consequence of such armature core movements, the member f2 will be shifted longitudinally of the assembly, permitted by a substantial longitudinal extent of the slots through which the arms '33 pass, and also laterally of the assembly, through eccentric rotation. The resultant movement of frame or member l2 is utilized, through a suitable coupling agency, to effect the desired shifting of the transmission gearing.

he coupling agency is found in the present example, in an arm or lever l8 seated upon a lateral extension is of frame 25 (figs. 7, 10 and 11). The extension l9 is provided with a slot Bil therethrough, the major axis of which is at a right angle to the axis of the electroinagnet assembly. Slidably seated in the slot and threadedly engaging the lever l8 substantially intermediate its ends, is a pivot pin 8! provided with a head 82 which engages the under side of extension 19. The headed pin serves to retain the lever in assembly on the extension, and in co operation with the slot 83, permits both a pivotal and bodily displacement movement of the lever. Gne end 83 of the lever is preferably furcated for pivotal engagement with a rib or flange 84 formed on the member 2. The connection thereto is effected by a pivot pin 35 and is made at a point on the flange substantially intermediate the ends of member 72 (Fig. 7). he opposite end 86 of the lever is formed to provide, in cooperation with a Sl secured thereto by bolts 88, a hemispherical socket 853 for the reception of a ball type head on the transmission gear-shift member 9%. The member is somewhat modified over the prevailing manually actuab-le gear-shift lever, in that it is considerably shortened so that the ball-socket connection of the electromagnetic shifter thereto is relatively close to the lever housing 2 2.

The relative positions of the elements above described, as shown in Figs. 7, 10, and 11, are those which effect a neutral position of gearshift lever 9i and hence of the transmission gear assembly. In this instance, the armature core assemblies 53 and 60 (which are longitudinally movable as a unit) are longitudinally centralized with respect to the winding assembly 3Q and to the elements 35 and 36 (Fig. 7) while the poles of inner core 60 are in magnetic register with the opposed poles 55 of the outer armature (Fig. 11) the position of the inner core of course, determining the positions of the eccentrics 69 and I which is the neutral condition of the mechanism, are disposed as indicated for the eccentric 70 in Fig. 10. In the shifting operation of the device as will hereinafter more fully appear, longitudinal displacement of the armature cores as a unit, say to the right in Fig. '7, will effect through the described gear-lever connecting structure, movement of the gear-lever 9I to one extreme of its neutral travel (to the left in Fig. 7). Following this, a rotary movement of inner core 60, will effect through the eccentrics, actual gear-shifting movement of lever QI; rotation of the core in one direction producing a gearshift for reverse drive, and in the other direction producing a gear shift for first speed drive. In like manner, longitudinal displacement of the cores as a unit, in the opposite direction,

as to the left in Fig. 7, and thence rotation of the inner core 60 in one or the other direction of its rotary movement, will effect gear-shift actuation of lever SI to produce second speed, or third speed gear-drive conditions in the transmission assembly. The foregoing description of speed positions is given in respect to a so-called standardshift speed-change transmission, and may of course be modified for different speedchange control requirements.

As before indicated, the electromagnetic shifter is controlled either manually or automatically, through suitable switching mechanism and selector devices. Describing now the manual control mechanism, this apparatus includes a switch assembly generally indicated at 02 (Figs. 7 and 8), which is by preference, arranged adjacent to and externally of the end plate 3|. The switch comprises a contact-supporting disc 93 secured to plate 3I by screws 94 and spacer elements 95, the disc having mounted thereon paired contacts 95, El, 08 and 99 arranged in arcuate or spread fashion near the periphery of the disc (righthand side of Fig. 8). The adjacent pair of contacts 95 and 91 are angularly spaced to a greater extent than the others for a purpose presently appearing. Similarly arranged near the diametrally opposite peripheral section of the disc, are an equal number of paired contacts I00, IOI, H32 and I 03, the arrangement being such that paired contacts I 00 are in diametral register with the pair 96 and similarly with the pairs Nil-91, It2- 3 and I03 99. Paired contacts Q6 and I00 are indicated on the disc by the letter R, designating these as the reverse-speed contacts, while the'next adjacent pairs in register are provided with numeral indicia 1, indicating them as the first-speed contacts. The indicia 2 and 3 are applied respectively, to the succeeding paired contacts, indicating secondand third-speed contacts. Radially inwardly of the right-hand set of contacts (Fig. 8) and arcuately coextensive therewith, is a single contact plate element I04, while a like contact element I05 is similarly arranged with respect to the lefthand set of contacts.

The rotary contact-bridging elements of the switch are supported upon an insulating flanged hub I00 pivotally mounted on the axial portion of the disc, the hub being operatively connected to a stub-shaft I01 recessed in one end for the operative reception of one end I03 of a flexible switch-actuating shaft I09. A pair of electrically connected spring-contacts or switch blades I I0 and I I I are secured to the flanged hub, as by the screws II2, the contact H0 electrically engaging at all times the contact element I04, while the other element I II is arranged for selective engagement with the adjacent paired contacts. As a result, in a given position of the switch blades, the blade III serves to bridge the elements of one of the paired contacts corresponding to the givenv switch position, while both switch blades cooperate in bridging the paired contacts engaged by blade III, with the contact element IM. A similar pair of switch blades H3 and lit operate in the same manner with respect to the opposite set of paired contacts and contact I05, but the paired switch blades are insulated one from the other, through the insulated hub I06, as will be readily observed. It is to be noted here that a switch-open condition obtains when the opposite switch blades III and Hi are disposed respectively, in the zones between paired contacts R and 1, as shown in Fig. 8, this position of the switch corresponding to the neutral condition of the gear-shift device, as will later appear.

The switch structure is enclosed by a cover H5 secured to the plate 3 I, as by the screws 33 which serve to secure plate 3i to the cylinder 28. An aperture H6 is provided in the cover, through which the stub-shaft I0! extends, the aperture being defined by a flange portion H! which is externally threaded to receive a collar H8 serving to secure the end II9 of a flexible tube I20 to the cover. The tube I20 encloses the flexible switch-actuating shaft I59, and both extend over the foot board and upwardly along the steering wheel column (Figs. 1 and 4) to a frame member I2I, the latter being clamped or otherwise secured at one end I22 to the steering column, as by the bridge piece I23 and bolts I24. The frame I2I is located substantially adjacent to and beneath the steering wheel I4, with its outer end portion I 25 extending beyond the steering wheel rim and formed to provide a segmental plate element I26 for a purpose presently appearing.

A switch-actuator arm I2'I is operatively secured at one end to a pin I28 pivotally carried by the frame adjacent the steering column (Fig. 4), the pin extending through the frame for operative connection as at I29, to the switch shaft I09. The opposite end of the arm I2! is provided with a handle I 30 for manual manipulation of the arm, movement of which attains through the pin I28, rotation of shaft I09 and hence actuation of the switch blades heretofore described. As shown in Fig. 4, the end of the shaft tube 220 is connected to an externally threaded flange I,3I formed on the member I2I, through a threaded collar I32, thus completing the enclosure of the shaft I09.

Pivotal movement of the arm I2? is limited by stops I33 at opposite ends of the segmental plate I26, while a yieldable retention of the arm is any one of a plurality of control positions relative to the plate I20, is attained in the following preferred manner: Substantially equally radially spaced on the plate I26 are a plurality of semi-spherical depressions or seats, there being five such seats in the present example, indicated at I34 (Fig. 3). The under surface of that portion of the arm I27 overlying the plate is provided with a slot I35, and carried by the arm is a leaf spring I23 secured at one end by a screw I37, the spring being in register with the slot so as to enter the same when upwardly depressed. The free end of the spring supports a semi-spher ical ball element I38 which normally seats in one of the plate depressions I34. Thus as the arm I2? is actuated, the ball I38 rides out of its seat in one of the depressions I35, permitted by the leaf spring, and then snaps into another seat as the arm and its ball are brought into seatregister.

For control purposes, the several seats I34 are provided with suitable indicia on the plate I253, as shown in Fig. 3, wherein the uppermost seat is indicated by the letter R, the next adjacent seat by the letter N (shown in dotted lines beneath the arm I2i), and the next three seats indicated consecutively by the numerals l, 2 and 3, the indicia indicating respectively, reverse speed, neutral, first, second and third speed conditions of the transmission assembly.

In the operative relation of the manual actuator I2? to the switch blade assembly of the switch 92, positionment of the arm I27 so that its ball element engages the seat R on plate I26, effects through the flexible shaft Hi9, a corresponding positionment of the switch blades in contact with the contacts R. Actuating arm I27 to the neutral seat N effects a neutral or open condition of the switch, wherein the switch blades are then disposed in the space between contacts R and 1 as in Fig. 8. Further movement of arm I21 to seat 1 effects switch blade contact with contacts 1, and similarly as to seats 2 and 3 and like numbered switch contacts.

Turning now to the circuit controlling switch assemblies disposed at the opposite end of the gear-shift device, there are two such switches indicated generally at I331; and I381), both actuated by the armature members as will later appear. An insulating switch contact supporting structure of annular form is secured, as by screws I39, to the end plate 32, the structure comprising an inner annular block Hi9 and an outer annular block I lI. Describing first the switch I88a, the inner block is formed to provide an annular recess I 32 for the reception of the flange portion I43 of a contact disc I44, the disc being operatively connected to a portion of shaft 66 which projects outwardly beyond plate 32, as by a key element I65 engaging an axially extended key-way M in the shaft. In this manner, the disc is confined against axial displacement with the shaft 66 (the shaft being arranged for axial displacement as well as rotary movement, as heretofore described), but follows the rotary movement of the shaft. The extended key-Way, of course, serves to permit axial displacement movement of the shaft relative to the disc.

A pair of diametrally opposed contact segments Ml and 5 58 are, by preference, embedded in the periphery of disc I44, being insulated from each other by reason of the insulating properties of the disc. Projecting inwardly of the annular block Hill are a plurality of radially spaced, pairs of contact brushes Hi8, I59 and I5I, each brush being urged by a spring I52, inwardly against the peripheral face of disc I44 (Fig. 9), and each provided with a conductor terminal connection. The switch arrangement is such that the paired brushes Hi9 and I5I are diametrally opposed, while the third pair I50 is displaced at substantially a right angle thereto. Hence, the segments I l? and I 38 may bridge respectively, the paired brushes I49 and IiiI at a given time, while rotation of disc I 14 through a ninety-degree arc in either direction will serve to effect a bridging of paired brushes I50 by one or the other disc segment.

Describing now the other armature switch I38!) and referring to Figs. 7, l2 and 13, the outer end 5 1 of shaft 66 is somewhat reduced in diameter, providing a shoulder I55. Seated upon the shaft end I55 is a collar element I56 formed of insulating material, the inner end of the collar abutting the shaft shoulder I55. The collar is secured upon the shaft for rotative as well as axial-displacing movement therewith, by a clamping nut I5! threadedly engaging the outer end of the shaft. Carried by the collar and preferably embedded in a peripheral portion thereof intermediate its ends, is an annular contact element or ring I58 which'cooperates with contact elements on the block MI. The latter contacts are comprised of diametrally opposed contact brushes I59 and I60 arranged in an intermediate portion of the block MI and engaging the peripheral surface of the collar ifili; diametrally opposed brushes I6I and I62 displaced substantially ninety degrees from brushes le and IE0, and arranged near the outer end of the block, in a transverse plane spaced from but parallel to the transverse plane of the contacts IEQ-IBO, and a third set of diametrally opposed brushes I63 and I84 arranged in parallel longitudinally of the block, to the brushes Nil-I82, but disposed near the inner end of the block and in a transverse plane spaced from but parallel to the transverse plane of brushes I59-I 60. Each of the several brushes is urged against the collar by a suitable spring I35 and each is provided with a suitable conductor terminal connection. The switch assembly I382) just described, is actuated solely by axial displacement of the collar, as effected by the shaft 66 in response to such movement of the armature structure heretofore described. The control function of both switches I38a and Iiflb will hereinafter appear.

As shown by Figs. '7 and 9, the end plate 32 is utilized to support limit switch assemblies I55? and I68, located on opposite sides of the block structure Mil-MI. The switch assembly IS'I comprises a magnet core I69 and energizing winding I70 therefor, secured in any desired manner (not shown) to the plate 32, and an arm structure pivoted to plate 32, as at I1 I. The arm includes an insulated portion H2 supporting spaced contact plates H3 and lit, and a magnetic armature portion I75 adjacent the core I69, the two portions being secured together by a suitable screw I75. Carried by the plate 32 and arranged adjacent the arm portion 1'32, is an element I11 of an insulating material, which supports paired contacts I78 and III], the arrangement of these contacts being such that plate I13 serves to bridge contacts I78, while plate I" serves to bridge contacts I79. The pivoted arm structure is biased to effect such contact bridging relation, as by a spring I80, the switch being opened upon energization of core I59 which attracts the armature I and thus pivots the arm to break the switch circuit. 7

The other switch assembly I68 is of the doubleacting type, being comprised of a magnet core I81 and energizing winding I82 therefor, and an arm structure I33 pivoted to the plate 32, as at 184. The pivoted arm includes an armature element I85 adjacent core NH and an insulated portion 183 to which the armature is connected, as by the screw 81. The arm portion I83 supports a contact bridging element I88 on one side thereof, provided with a conductor terminal connection ltd and a contact portion 133 projecting to the opposite side of the arm. The arm is urged by a spring 13!, away from the core l3l and into a position wherein the bridging element I83 interconnects spaced stationary contacts W2 and 193 carried by an insulating member I94 secured to plate 32. On the opposite side of the arm is arranged a single contact 195 supported by an insulating member I96 secured to plate 32, this contact being engaged by the contact portion I90 of element 88 when the arm is actuated in response to energization of the core I81.

Enclosing the switch structures hereinabove described, is a cover I91 which is secured to plate 32, as by the screws 33 which serve to secure plate 32 to the cylinder 28. I

The automatic control for the gear-shifter de-. vice is illustrated in Figs. 1, 18, 19 and 20, and comprises essentially a speed-governor controlled switch mechanism which may be operatively inserted in the drive shaft for the usual automotive speedometer. The mechanism is enclosed by a housing :38 which is by preference, secured to the transmission housing I99 as by bolts 200. J ournalled in the housing E98 is a shaft 221 which projects at each end, through and outwardly beyond the housing walls. One projecting end 222 of the shaft is operatively connected to a short shaft portion which may be integral with a pinion 223, in mesh with a drive gear 204 on the vehicle drive shaft 235 leading from the transmission assembly. Shaft 20! is thus driven from the vehicle drive shaft and hence its speed is directly proportional to the speed of the vehicle. The opposite projecting end 206 of shaft 201 is connected to a speedometer drive shaft or cable 291 which may lead to the usual vehicle speedometer (not shown).

A ball-type governor assembly is mounted on shaft 20!, the assembly including a collar 203 secured to the shaft'as by a pin 2139. The collar cooperates with a member 210 slidably sleeved on the shaft, in the pivotal support of arms 2H and 2l2 which support inertia elements such as ballweights 2H3. Member 210 is axially spaced from the collar, and encircling the shaft between these elements is a compression spring 254 which serves to bias member 215 away from the collar. In the operation of the vehicle, the centrifugal influence of the weights will effect axial displacement of the member 2i!) along shaft 201, and such movement of the member is utilized to actuate a switch mechanism located within the housing I98 and indicated generally at 2H5.

The switch is comprised of a base plate 213 formed of insulating material and provided with corner projections or feet 211 which serve to space the plate inwardly of a wall portion 218 of the housing, to which the plate is secured, as by screws 219 engaging the feet 211. At one end of the plate are located a plurality of paired contacts 22B, 22! and 222, while at the opposite plate end are located similar paired contacts 223, 224,

and 225. The upper and lower sets of contacts (Fig. 20) are each arranged in an arc the axis of which is substantially the center of the plate. Secured to the plate inwardly adjacent the contacts 220-222 is an arcuate contact segment 226 which is substantially coextensive with the arcuate extent of the contacts, while similarly located with respect to the contacts 223-225 is a like contact segment 221. A switch shaft arranged below and at a right angle to the governor shaft 2M, 228 has its ends journalled in housing walls 2H3 and 229, as at 230 and 231 respectively. The shaft extends through the center of plate 2H5, and operatively secured thereto is a sleeve 232 formed of insulating material and provided with a flange 233. Carried by the flange are a pair of spring contacts 234 and 235, being connected together and to the flange by a screw 233. The spring contact 234 engages the segment 223, while the contact 235 is arranged for engagement with the paired contacts 223-222. Diametrally opposite the spring contacts 234-235, are similar spring contacts 231 and 238 secured together and to the flange 233 by a screw 239, the two sets of switch arms being insulated from each other by the insulating flange. Spring arm 231 engages segment 221, while arm 238 engages contacts 223-225. As will be observed in Fig. 20, the switch arm arrangement is such that when the spring contact 235 is disposed in bridging relation to paired contacts 222 (the arm 234 serving, through arm 235, to connect the segment 228 to the contacts 222, the opposite arm 238 bridges the paired contacts 223 (the associated arm 231 through arm 238, connecting the segment 221 to contacts 223). A like condition obtains between the switch arms and the opposed paired contacts 22! and 224, and similarly with opposed paired contacts 223 and 225. In Fig. 20, the numeral l is applied to paired contacts 222 and 223, indicating these as the control contacts for first speed condition of the transmission and its shifter device; the numeral 2 to paired contacts 22| and 224, indicating second speed control contacts, and the numeral 3 to paired contacts 220 and 225, indicating these as the third speed control contacts.

The switch is operated through actuation of its shaft 228 by the governor mechanism. The operative connection between the shaft and governor sleeve 210 is effected preferably by a yoke 24!] provided with a stem 23! which is bored to receive a plunger 242 operatively connected at its end 243 to the shaft 228 (Figs. 18 and 19). The yoke arms are pivotally secured to ears or projections 244 formed on a ring assembly 245 which is secured to a flanged portion 226 of the governor sleeve 2H]. In this manner, axial displacement movement of the sleeve is transmitted as rotary movement to the shaft 228, through the yoke and plunger, the relative movement between the yoke stem and plunger permitted by the arrangement, being provided for an obvious reason.

In the present example, the position of the switch arms when the vehicle is at rest, is as shown in Fig. 20 wherein contacts 1 are bridged. Provision is made in the governor assembly for maintaining such switch position as the vehicle accelerates in speed and until a predetermined vehicle speed is attained. As shown in Fig. 18, the governor shaft or spindle 20! is provided with longitudinally aligned, semi-spherical seats 241, 248 and 249 which are relatively spaced a predetermined extent. The sleeve 2| 0 is provided with a lateral bore 250 open to the governor shaft, in which is disposed a ball element 25! which is biased against the shaft by a spring 252 arranged in the bore and between the ball and a bore-closure element 253. In the vehicle-at-rest condition, the ball seats in the spherical seat 2M, and serves releasably to lock the sleeve to the shaft. The spring 252 utilized in the arrangement, is of a predetermined compressive or biasing force such that it will maintain the ball in seat 241 as the governor mechanism operates during vehicle acceleration up to a predetermined speed.

Upon attaining such predetermined speed, the centrifugal force of the governor weights which opposes the spring force tending to maintain the ball in seat 2&7, overcomes the spring force and effects axial displacement of the sleeve toward the collar 2% and against the resistance offered by the governor spring 2 i4. As the sleeve is displaced, the ball rides into the next adjacent seat to bridge contacts 2, and this condition is maintained throughout the second speed range of the vehicle. When the vehicle attains third or running speed, the sleeve is again displaced until the ball rides into the third seat 249, in which position of the sleeve relative to the spindle, the switch will have been actuated to bridge contacts 3. The last described sleeve and switch positions are maintained by the springbiased ball in seat 239, throughout the running speed range of the vehicle, as in this instance, the governor spring H4 is compressed to substantially its maximum extent, thereby precluding further inward displacement of the sleeve.

As the vehicle speed is decelerated from running speed through second and first speeds,

to minimum or zero speed, the operation of the sleeve and switch is the reverse of that above described. It is desired to point out here as a particular feature of the governor switch control, that during vehicle acceleration or deceleration from one transmission speed range to another, that sleeve displacement from one ball seat to another is effected by a snap-action, whereby the switch is operated with a corresponding snapaction, this being desirable to effect a positive and quick circuit-change through the switch.

Before describing the circuit connections for the apparatus above described, reference is made to Fig. 5 in which is shown a preferred form of circuit-interlock switch indicated generally at 253a, which is provided for eifecting a changeover in the circuit control arrangement, from manual control of the gear-shift device to automatic control thereof by the governor actuated switch, This switch has its parts mounted in a housing 254 which for convenience in respect to operator-accessibility, is suspended from the plate I28 carried by the steering-wheel column (Fig. 3), securement thereof to the plate being effected by suitable screws 255. The switch, which is of toggle type, comprises a movable switch contact support 256 formed of insulating material and operatively secured to one end of an element or rod 257. The rod is slidably journalled in an internal transverse wall portion 258 of the housing, and is operatively connected on its opposite end to a pair of pivotally connected toggle members 259 and 2%. The free end of the member 259 is pivotally seated in a housing wall recess 26!, while the free end of member 250 is pivotally connected to substantially the mid-point of a bar 262. Pivotally connected to one end of bar 262 is a plunger element 263 which projects through a wall portion of the housing, and pivotally connected to the opposite end of the bar is a similar plunger 2% which also projects through a wall of the housing and in parallel to the plunger 263. A knob 265 is provided on the outer end of plunger 26 1 for manual actuation thereof. The projecting end of plunger 2'63 is in line with a finger element 266 depending from theswitch-actuator handle I36, so that when the handle and its arm l2? are actuated to the zone of the plunger 253, the finger 266 will engage the rounded end of the plunger and displace the plunger inwardly of the housing.

The location of the switch and hence of the plunger 2% is by preference, between the neutral and first speed positions of the handle I30 (Fig. 3), so that depression of the plunger will occur during handle movement between these zones. Depression of the plunger 263 serves to effect an over-center condition of the toggle members 259 and 263, to the position indicated in Fig. 5, such position being releasably retained by a toggle spring 26? sleeved on the toggle member 25$. Such condition of the toggle members positions the switch contact support 256 adjacent the lower or bottom wall 2&8 of the housing, as shown. Actuation of the toggle mechanism to its opposite over-center condition, effected by the manual operation of plunger 2&4, serves to position the support 256 adjacent the wall element 258. It is to be noted that the plunger 254 is operable to effect either over-center condition of the toggle mechanism, while the plunger 253 as operated by the finger 265, may effect only the over-center condition shown by Fig. 5.

Supported by the lower housing wall 258 are spaced contacts 269 and Z'ill, while similarly carried by the internal housing wall 258 are contacts 27! and 272 in vertical register, respectively, with the lower contacts 269 and Eli). Supported by the movable member 256 are contacts 213 and 214 insulated from each other by the insulating member 255. In the lower position of member 256, contacts 213-259 and EFL-2T9 are engaged, while in the upper position, contacts 2 13-27! and 274-272 are engaged.

Fig, 6 illustrates a preferred form of clutch pedal actuated switch which, when closed upon operation of the pedal to effect clutch-disengagement, serves to complete the energizing circuit for the gear-shift device, as will presently appear in the description of the circuit connections for the system. The switch, which may be termed a master switch, includes a housing 275 which is mounted in the foot-board 22 and adjacent the clutch arm IS, being secured to the board by screws 216. The housing is formed of insulating material and carries in the bottom wall 21'! a pair of contacts H3 and 2E9. Slidably journalled in the housing is an insulating disc 28 3 which carries a contact plate 28i adapted to bridge the contacts 278 and 279 upon depression of the disc in the housing. The disc is carried on one end of a rod 282 slidably journalled in a stationary member or plug 283 secured in the housing in any suitable manner. The rod extends into an axial chamber or bore 284 in the plug and is provided at its opposite end with a plunger element 285 which seats in the bore. A compression spring 285 encircles the rod portion within the bore 284 and serves to displace the plunger and its rod upwardly of the plug and so as to project the end portion 281 of the plunger upwardly beyond the housing, as shown in Fig. 6. Such movement of these parts effected under the influence of the spring bias, is limited by abutment of the rod-supported member or disc 289 with the inner end of the plug, while movement of the plunger, rod and disc inwardly of the housing, is limited by abutment of the disc-carried contact plate 28I with the contacts 218 and 219, in which position the latter contacts are bridged to complete the circuit therethrough.

In the assembly relation of the switch and clutch-pedal I1 (Fig. 2), the plunger 285 is disposed in the path of clutch-pedal movement, so that when the clutch pedal is depressed to effect a clutch-disengagement, the pedal Will engage the upper or free end of the plunger and displace the same inwardly of its seat 284, against the bias of spring 286. As a result, the contact disc 299 will be displaced to efiect a circuit closure of contacts 218 and 219 by the plate 28I.

Release of the clutch pedal to effect reengagement of the clutch, will permit spring 266 to eifect in the manner described, an open-circuit condition of the switch.

Fig. 21 illustrates the electrical circuit connection for the speed-change device and switch.

mechanisms hereinbefore described, these elements being shown partly in a structural, and partly in diagrammatic manner to facilitate an understanding of the circuit arrangement. A

source of electrical energy for the system, is

provided by a battery 299 which may be the usual automotive vehicle battery conventionally serving to supply the vehicle ignition and lighting systems. The negative terminal of the battery is grounded through a conductor 29I, to a portion of the vehicle frame, as is usual practice. The positive battery terminal is connected by lead 292, to the contact 218 of the clutch-pedal actuated master switch, While the opposite contact 219 of the switch is connected to the switch arm terminal I89 of limit switch I68, as by a lead 293, and to one of the paired contacts I18 of limit switch I61, by a branch lead 294. The other contact of the pair I18 is in circuit through a lead 295, with branched leads 296 and 291, the branch 296 being connected to one of the paired contacts I5I of the armature actuated switch I 38a, and the branch 291 to one terminal of the armature winding 64, the opposite winding terminal of which is grounded through lead 298. The opposite contact of the pair I5I is connected by a lead 299 to the contact I59 of the other armature actuated switch I382),

The armature pole windings 55 are connected in series by a conductor 390, while the terminal of one is grounded through a lead 39!, and the terminal of the other connected to contact I93 of limit switch I63, as by a lead 392. The windings a of the other set of armature poles 540, are also connected in series, as by a conductor 399, while the terminal of one thereof is connected by a lead 394 to the armature switch contact I63, and also to the contact ISI thereof, as by a branch lead 396. The terminal of the other winding is connected to a lead 366 which has its terminus at one of the paired contacts 229 of the governor controlled switch 2I5. In circuit with lead 396 are branch conductors 391, 398, 969, 3I9, 3H and 3I2 which are connected respectively, to one of the paired contacts 224 (of governor switch 2I5), I92, I99, 99, 91 (these four on manual switch 92), and 222 (on governor switch 2I5). Considering the other contact of each of the paired contacts above noted, that of contacts 224 is connected as by lead 41 heretofore noted, to

the series connection 3I3 between field coils 49 and M, while branched from this lead 41 are leads 3I4, 3I5 and 3I6 which are connected respectively, to one of the contacts 225 on governor switch 2I5, to one of the contacts I92 on manual switch 92, and to the opposite or other one of contacts I92 on the same switch; the other contact of the pair I99 is connected by a lead 311 to conductor 5| leading from the end terminal 328 of field winding 42, the conductor 5i extending to one of the contacts 223 of governor switch 2 I 5, while a branch lead 3I9 connects conductor 5!- to one contact of the pair I9I on manual switch 92; the other contact of the pair 99 on manual switch 92 is connected by a lead 329 to the remaining contact of the pair 229 on governor switch 215, while branch leads 32I and 52 (heretofore noted) connect respectively, the lead 326 to one of the paired contacts 98 on the manual switch, and to the end terminal 322 of field winding 44; the other contact of the pair 91 is connected by a conductor 323, to the remaining contact of the pair 222 on governor switch 2I5, while branch leads 324 and 49 (heretofore noted) serve to connect respectively, the conductor to one of the paired contacts 96 on manual switch 92 and to the series connection 325 between field windings 49 and 43.

Completing the circuit connections for the remaining contacts of the manual and governor switches, the opposite contact of the pair 223 on the governor switch is connected by a conductor 326, to the contact I62 of the armature switch I381). Conductor 326 is also in circuit with the remaining contacts of the pairs 225 (on governor switch 2I5), I63 and NH (the latter on the manual switch), as by the respective branch leads 321, 328 and 329. Further, a lead 336 connects conductor 326 to the remaining contact of the pair 22I on the governor switch, while branches 33I and 332 from lead 339, are connected respectively, to the remaining contacts of the pairs 96 and 98 on manual switch 92. A branch lead 333 from conductor 326, is connected to the contact I64 of the armature switch I362).

The contact segments I94 and I95 of the manual switch are connected respectively, as by respective leads 334 and 335, to the contacts 269 and 216 of the interlock switch 253a, while the similar segments 226 and 221 of the governor switch are connected respectively, as by the respective leads 336 and 331., to the interlock switch contacts '21I and 212. The interlock switch arm 213 controlling contacts 299 and 21I, is in circuit with one of the paired contacts I19 of limit switch I61, as through a lead 339, while the other switch arm 214 thereof is grounded through a lead 339. The opposite contact of the pair I19 is connected by a branch lead 349 to a conductor -34I, the conductor being connected at one end to the contact I95 of limit switch I66, and at its other end to one of the contacts of pair I59 on the armature switch I39a. The opposite contact I56 is connected by a lead 342, to one terminal of relay coil I19 on limit switch I61, the other terminal of which is grounded through a lead 343.

On the armature switchI38a are paired contacts I49, one of which is grounded through a lead 344, while the other is connected through the lead 48 heretofore noted, to the series connection 345 between field windings 4| and 42. Further, the series connection 346 between field windings 43 and 44, is connected by a lead 341,

to the contact I92 of the pair I92--I93 on limit switch I63. Completing the circuit arrangement is a conductor 348 which serves to connect the contact I89 of the armature switch I38b to one terminal of the relay coil i82 of limit switch I88, the latter terminal also being connected to contact I95 by a lead 349. The opposite coil terminal is grounded through a lead 358.

Fig. 21 illustrates the relative positions of the operative elements of the system in their initial or tie-energized condition, as with the clutchpedal switch open; the limit switch I68 is shown as de-energized and in position to bridge contacts I92-I93; the limit switch I61 denergizecl and in position to bridge respectively the paired contacts I13 and I19; the manual switch 92 in neutral; the governor switch 255 in position to bridge paired contacts 222 and 223; the switch element 358 of the armature switch I381) in position to bridge contacts I 59 and I68, and .the switch elements I41 and 448 of the other armature switch I33a in position to bridge respectively, contacts I49 and II, leaving the contacts I50 thereof in open-circuit condition. Also, the armature windings 55, 55a and 84 are de-energized, as are the field windings 49 through 44. It is to be noted that the armature core structures 53 and I39 heretofore described, are illustrated in the upper left portion of Fig. 21, and also in the upper right portion of the figure, in relation to the field windings 49-44, the latter view thereof being shown as a composite cylinder 35I in centralized relation to the winding assembly. The centralized relation of the core structure 35I to the field windings is the normal initial or neutral position thereof, which serves to posi tion armature switch I58 in bridging relation to the contacts I53I89. The location of armature switches I41 and I48 in respective bridging relation to contacts I49 and I5I, is effected as an initial condition, by the initial or neutral position of inner armature 69 such that its poles underlie poles 55 of the outer armature 53. (Figs. 21 and 11.)

As will be observed in Figs. '1, 8, 10, 11 and 12, the several conductors leading to the field windings, the armature windings, the manual switch, the two armature switches and the limit switches (all being parts of the speed-change or-shifter device shown in assembly in Fig. '7), are for convenience and compactness of wiring assembly, arranged along a side of the casing 28, and are enclosed by a cover 352 secured to the casing by screws 353. Also, those leads connecting the governor switch to the gear-shifter mechanism, are enclosed by a cable 354 (Figs. 1, 2, '1 and 19).

Considering the operation of the mechanism, the initial step generally necessary to effect a gear-shift in the transmission, is to disengage the clutch as by pushing downwardly on the clutch pedal. As before noted, such actuation of the clutch pedal effects a closure of the batterycircuit switch 28I which when thus closed, completes several initial energizing circuits for the mechanism, as will now appear. 4

Closure of the battery switch completes a circuit to armature windings 55, as from the positive terminal of the battery through circuit elements 292; 218; 28I; 219, 293; I39; I88; I93; 382; windings 55 and series connection 398 thereof; 30I to ground and thence to the grounded lead 29I connected tothe negative terminal of the battery. The armature winding 64 is also energized, as from the battery through circuit elements 292; 218; 28I; 219; 293; 294; I18; I13; 295;'2'91;Winding 64 grounded lead 298 and thence to the battery negative terminal through grounded lead 29 I. As a result of the armature energization described, the windings-55 produce a magnetic field for the inner core 68, such that the poles of armature core 68 will be magnetically drawn into register with the poles 54 of armature core 53. Thus the armature windings 55 (and 550 as will later appear) serve as field windings for the inner armature. The resulting rotary movement of core 68 efiectsas heretofore described, closure of paired armature switch contacts I49 and I5I by the respective elements I41 and I48. Closure of the above contacts completes an energizing circuit for the field windings 48, 4| and 43 in series, as from the battery through circuit elements 282; 218; 28I; 2'19;-293; I89; I88; I92; 341; 346; field windings 43, 48 and M; 345; 48; I49; I41; 344 to ground and thence to battery negative lead 29I. Energization of these intermediate, series-connected sections of the field Winding, creates a magnetic field which serves longitudinally to centralize the armature assembly (35I in Fig. 21), with respect to the field assembly.

With the armature cores positioned relative to each other as described, and also with the armature assembly centralized with respect to the field assembly as described, the transmission gear-shift lever 9! under the control of the armature elements through the forked arm and pivoted lever system heretofore described, will be positioned in neutral and particularly in the center of its neutral travel. At the same time, centralizing of the armature assembly with respect to the field assembly, efiects a positionment of armature switch I58 in contact-bridging relation to contacts I59--I68, this as noted hereinbefore. Closure of contacts I59-I6Il by the switch element I58 serves to complete an energizing circuit for the limit switch I68, as from the battery through circuit elements 292; 218; 28I; 219; 293; 294; I18; 113;295; 296; I5I; I48; 299; I59; I58; I68; 348; relay winding I82; via lead 358 to ground, and thence to the battery negative lead 29I Current flow through the relay coil I82 magnetically energizes the core I8I which in turn attracts the switch arm, and thereby open-circuits the contacts I92-I93 and effects a closure of contacts I98--I95, the open-circuit at contact I92 serving to de-energize the field windings 43-48-4I, while the open circuit of contact I93 serves to de-energize the armature windings 55. A holding circuit for the relay coil I82 is thereby set up, as by circuit elements 292; 218; 28I; 219; 293; I89; I88 and I98; I95; 349; coil I82; grounded lead 359 and thence to battery negative lead 29!. At the same time, the interlock switch 253a is placed in circuit with the battery, as from the positive side of the battery throughthe circuit elements 292; 218; 29I; 219; 2.93; I89; I88; I98; I95; MI; 348; I19; I14; 338 to the movable arm 213 of switch 253a, the other arm 214 of which is permanently in circuit with the battery negative lead -29I through the grounded lead 339.

The above initial circuit conditions are efiected solely by closure of the clutch-actuated switch 28I, being attained in every instance of such switch closure. By this initial arrangement of the mechanism and the noted circuit elements, the system is conditioned for efiecting a shift of the transmission speed-change gearing'by operation of the speed-change or gear-shifter device, as efiected by :either the manuallyactuated switch '92 or'the governor-switch2l5. Selection ofthe manual or governor switch for control of the device is attained through the interlock switch 253a, as by manipulating the switch to effect engagement of its arms 213 and 214-with the respective contacts 269 and 210 for control by the manual switch, or to efiect engagement of the arms respectively With the contacts 2'1I and 212 toenable control by the governor switch.

Describing the operation of the device by manual switch control thereof, and assuming the initial circuit conditions to be set up as above described, the proper setting of the interlock switch for manual control may be effected either by pulling outwardly the toggle-actuator handle or knob 265, why swinging the manual switch actuating handle I in a direction to cause contact of its finger 266 with the toggle-actuator plunger 263, so as to displace the plunger inwardly of the switch housing. In-either method for pre-setting the interlock switch, the toggle mechanism will be actuated to an over-center position in which the switch elements 213 and 214 engage respectively, the contacts 269 and 210, as in Fig. 21. The system is now conditioned for manual control through actuation of switch 92 by the handle I30 Assuming first that it is desired to reverse the transmission drive or in common terminology shift into reverse, the handle I30 is actuated to the position R. This effects, through the flexible shaft I09, 2. corresponding location of l the switch blades in bridging relation to paired contacts R. of-switch 92 (Figs. 8 and 21). As a result, energizing circuits for the armature and field elements of the gear-shifter device are set-up which cause these parts to operate in a ,manner to actuate lever 9| into its transmission gear reverse position, the relative positions of the elements and lever 9| in reverse, appearing diagrammatically in Figs. 14 and 14A. The circuits set-up are as follows: From the positive side of the battery 290 through circuit elements 292; :218; 28|;l219;1293; I89; I88 and I90; I95; 3 349; I19 and I14; 338; 213; 269; 3344; switch segment I04; blades l|0-| II; a contact 96; 324;

323; 49; 325; field windings 40, 41 and 42 in series;

318; 5|; 3|1; one of contacts I00; switch blades I|3-|I4; switch segment I05; 395; 250; 214; 339 to ground, and thence to the negative battery lead 29I. The resulting field produced by windings 40, 4| and 42 acting in series, magnetically displaces the armature core assembly (cores 53 and 68) indicated in Fig. 21 as I, to the right in the figure. This armature movement serves through the forked member 12 and pivoted lever 18, to shift lever 9| to one end of its travel in neutral (to the left in Figs. 14 and 14A).

' As the armature assembly isdisplaced longitu- 'dinally, it shifts the armature switch element I58 carried by the armature shaft 66, into bridging relation to contacts I63-I64. The following armature energizing circuit is completed thereby; from the battery positive terminal through the circuit elements 292; 218; 28I; 219; 293; I89; I89 and I90; I95; 340; I19 and I14; 339; 213; 269; 334; I04; blades |I0|||; the other contact 96; 33I; 330; 326; 333; I64; I58; I63; 304; armature windings a. and series connec-' tion 303; 306; 369; the other contact I00; switch blades ||3| I4; I05; 335; 210; 214; 339 to ground, and thence to the negative battery lead 29I. The energizing circuit for armature windings 55a thus effected, causes these windings to excite and so to polarize the armature poles 55 that they will attract the poles of inner armature and efiect a substantially'quarter-turn thereof into magnetic register with the poles tea, the direction of rotation, by reason of the particular polarization in this instance, being counterclockwise (Fig. 21). Such rotation of core 60 serves to rotate the armature switch blades I41 and I48 in corresponding direction, so as to opencircuit the contacts I49 and to bridge the contacts I50 by blade I48. The rotary movement of armature core 60 serves to effect movement of the gear-shift lever 9| from neutral into its reverse position (Figs. 14 and 14A). This is effected through a counter-clockwise quarterturn'of the eccentrics 69 and 10 as actuated by the core 60 through its shafts, which in turn produce a displacement of the forked member 12 towardthe cylinder 28 of the device, and hence a compound pivotal and bodily displacement movement of the lever 18, permitted by the pin and slot mounting thereof. Such movement of the lever 18 produces the desired shifting of the lever 9| from neutral into reverse position, wherein the transmission gearing will be conditioned for reverse drive of the vehicle.

The changed circuit condition of the armature switch resulting from rotation of armature 60, effects an open-circuit at contacts I49 and I5I, while effecting a closure of contacts I50 by the switch blade I48. Closure of switch contacts I50 completes an energizing circuit for the relay coil I19 of limit switch I61, as from the positive side of the battery through circuit elements 292; 218; 28I; 219; 293; I89; I88 and I90; I; I50 and switch blade I48; 342; relay coil I10; lead 343 to ground and thence to the negative battery lead 29L The relay core I69, now excited by the coil I10, actuates the switch to break the circuit connections of paired contacts I18 and I19 by the respective elements I13 and I14. The opencircuiting of contacts I19 serves to de-energize the field windings 404|-42, while the open-circuiting of contacts I18 effects a de-energization of the armature winding 64.

The circuit connections and disconnections effected during operation of the speed-change operator to produce a reverse gear-shift of the transmission gearing, occur in the sequence indicated in the foregoing description, and in a positive and rapid manner. Upon release of the clutch pedal to effect clutch engagement for reverse operation of the vehicle, the switch 28! becomes open-circuited which results in a complete electrical de-energization of the system. However, the armature core elements remain in their reverse gear-shift position, as in Figs. 14 and 14A, throughout reverse operation of the vehicle.

Assume now that it is desired to effect a transmission speed-change into first speed. As before, the clutch is first disengaged, which results in closure of battery switch 28L Immediately, the initial circuit conditions are set up as before described. Whereupon, the handle I38 may be shifted into the position 1, producing .a corresponding shift of the switch blades |0-| II and l|3| I4 into bridging relation respectively, to the paired contacts marked 1 on the switch. As a result, the field windings 49, 4| and 42 are energized, the circuit therefor being set up as before'described for the reverse condition, but

effected now through the contacts 91 and I0| of the manual switch 92. Such circuit may be readily traced on the wiring diagram of Fig. 21. The resultant longitudinal shift of the armature assembly 35| to the right in the figure, effects a corresponding shift of the lever 9| toone end of its travel in neutral, preparatory to a shift thereof intofirst speed position. Also, the armature switch I58 is again shifted to bridge contacts I63 and I64, which completes an energizing circuit for the armature coils 55a, the direction of current flow therethrough being now reversed from that produced in the reverse shift function of the system above described. Such circuit may be traced from the battery positive terminal through the circuit elements 292; 278; 28I; 2'53; 299; I89; I88 and I95; I35; 345; I19; and I74; 338; 213; 259; 334; I94; switch blades I Iii-I II; one of the contacts 91; 3| I; 396; armature coils 55a and series connection 333; 334; I93; I58; I64; 333; 329; 329; one of the contacts Ill-I; switch blades II3II4; I05; 335; 210; 214; 339 130 ground and'thence to the battery negative lead 29!. The resulting energization of armature windings 55a produces a quarter-rotation of armature core 60 in a clockwise direction, by reason of thereversed current flow in the windings, the armature rotation serving to shift the lever 9I from neutral into first speed position, as'shown in Figs. and 15A. In this instance, the eccentrics 69 and III are rotated in a clockwise-direction, as appears in the figure. At the same time, the rotary movement of the armature 60 actuates the armature switch I380. controlled thereby, in a clockwise direction to open-circuit the contacts I49 and I5I b blades I4? and I48 respectively, and to bridge the contacts I59 by the blade I41. As before, the bridgingof contacts I50 completes an energizing circuit for operating limit switch I61, which results in open-circuiting its contacts. clutch pedal to effect clutch-engagement for operation of the vehicle in first speed, opens switch 28I and hence de-energizes the system. Thereafter the parts remain'in first speedconditionthroughout vehicle operation in this speed ratio, and until the clutch is again disengaged.

Shiftin from first" into second speed, the handle I is actuated to the position marked 2, which actu-ates the switch blades IIIIIII and I I3I I4 into bridging relation respectively, to contacts 93 and I92, marked 2. Disengaging the clutch effects a closure of switch 28I which again sets up the initial circuit conditions heretofore described. With the contacts 98' and I92 bridged, the following energizing circuit for the field windings 4U, 43 and 44 is effected: From the positive side of the battery to the'switch segment I 94 by the circuit heretofore described therefor, thence through the switch blades IIU-III; one of the contacts 93; 32I; 320; 52; 322; field windings 44, 43 and in series; 3I3; 47; 3| 6; one of the contacts I02; switch blades II3-II4; I95; 335; 210; 214; 339 to ground and thence to the battery negative lead 29I. The resulting excitation of field coils 44, 43 and 40 in series, produces a magnetic field which acts to draw the armature assembly 35I to the left in Fig. 21, such displacement of'the armature assembly in this instance, serving to actuate the lever 9| to the other end of its travel in neutral, preparatory to a shift thereof into second speed position. The longitudinal shifting of the arma- Release of the ture assembly to the left in the figure, serves also to shift the armature switch I58 controlled thereby, into bridging relation to contacts I6! and I62, which immediately completes an energizing circuit for the armature coils 5511. Such circuit is thesame as that set up in the function of thesystem for effecting a transmission shift intofireverse, as h'ereinabovedescribed, the only departure in' this instance being that the circuit is completed through the contacts l6}I5I, instead of the contacts I33-I64-utilized in the former circuit. The excitation of the coils a in this instance, as in the instance of the reverse set-up, is of such polarity as to produce a counter-clockwise rotation of the armature 69 by a quarterturn, so as to effect thereby, a shifting of the lever 9| from neutral into second speed position, as shown in Fig. 16. It will be noted from this figure, that the eccentrics are rotated in the counter-clockwise direction to effect such gearshift'function of the device. At the same time, the counter-clockwise movement of the armature actuates the armature switch I 38a controlled thereby, so as to open-circuit paired contacts I49 and I5I, and to bridge contacts I50 by the switch blade I43. completes an operating circuit for the limit switch I67, which upon functioning, breaks the enerizing circuits for the field windings 44, 43 and 4il'and the armature coils 55a. Release of the clutch pedal to effect engagement of the clutch, open-circuits the switch 28I which effectively deenergizes the electrical control system, leaving the parts in second speed position.

Disengagement of the clutch which again closes switch 28I and sets-up the initial circuit conditions, followed by actuation of the handle I38 to position 3, results in circuit connections through contacts 99 and I93 which energize the system to effect a shift of the lever 9i from neutral into third speed or normal running speed, as shown by Figs. 17 and 17A. As in the second speed condition, there occurs a shift of the armature assembly to the left in Fig. 21, but in this instance, rotary movement of the core 59 is cl0ck wise, produced by an energizing circuit which is the same as that effected in the first speedchange hereinabove described, differing only in that the present circuit is completed through contacts-99 and IE3, instead of contacts 51 and IBI, as in the former case. Again, upon the'function of the device to effect a gear-shift into third speed, the armature contacts I50 are closed and the limit switch I5! is operated thereby, to break the field and armature winding circuits, while the release of the clutch open-circuits the switch 28! to eifect'a complete de-energization of the systerm.

It is to be noted that in shifting from third speed into second and/or into first speed, the handle I39 is shifted to its neutral position preferably before or as the clutch is disengaged, after which the handle may be actuated directly to the second speed position, or to first or third speed positions, as desired. In each event, the desired speed-change will be effected in the manner hertofore described.

. Turning now to the vehicle speed or governor actuated switch 2| 5 which controls only first, second and third speed-change functions of the device, the control thereby is effected automatically as distinguished from the manual control by switch 92. To render the automatic control effective, the interlock switch 253a must be actuated first, to disconnect switch 92 from the system and to connect thereto, the switch 2I5. This is effected by pushing in the button or knob 235, which actuates the toggle mechanism to displace the contact elements 213 and 274 into contact'respectively, with contacts 2H and 212. The system is now conditioned solely for speed-change control by the vehicle-speed responsive switch 2I5.

As before, closure at contacts I55 It will be noted from the description hereinabove, of the wiring circuit shown by Fig. 21, that the upper paired contacts 1, 2 and 3" of governor switch 2l5 are respectively, in parallel circuit relation to the corresponding upper paired contacts of manual switch 92, and the same parallel relation obtains for the lower paired contacts of both switches. Accordingly, the circuit arrangements for causing a functioning of the gear-shifter mechanism to effect speedchanges of the transmission in sequence through first, second or third speed, or directly to any one of such speeds, as attained through operation of the manual switch as heretofore described, are effected in identical manner by the operation of governor switch 2l5.

However, it is to be noted that the governor switch is initially, i. e., when the vehicle is at a stand-still, in such position that the paired contacts 1 are bridged, thus conditioning the circuits controlled by these contacts for effecting an immediate shift of the lever 9| into first speed position upon clutch-disengagement to close battery switch 281. Therefore, all that is required of the vehicle operator to effect acceleration of the vehicle in first speed, when the governor switch is in circuit, is to disengage or throw-out the clutch, start the vehicle engine and then let-in or engage the clutch. Whereupon the vehicle will accelerate in first speed, and the first speed drive condition of the transmission gearing will be maintained so long as the clutch remains engaged, and this irrespective of the actual vehicle speed which may be attained during the acceleration period.

While the first speed gear-shift condition of the transmission obtains, the vehicle may accelerate in speed slowly or more rapidly depending upon operating factors, as vehicle loading, road grades and the like. But unless abnormal or particularly adverse roadway or vehicle loadingconditions obtain, the vehicle speed normally will increase. Upon the attainment of a predetermined vehicle speed, the centrifugal force produced by the governor weights will act to effect a snap-displacement of the governor sleeve as heretofore described, to a predetermined position, such movement of the sleeve serving to actuate switch 2! so as to bridge paired contacts 2. Thereafter, upon disengagement of the clutch, the switch 28l will be closed thereby and a shift of the transmission gearing into second speed position will occur.

As the vehicle accelerates to normal running speed, the governor mechanism again functions to actuate the switch so as to bridge contacts 3, and when the clutch is again disengaged, the transmission gearing will be shifted into third or running speed position. It will be obvious from the foregoing that there may be effected a shift of the transmission gearing directly from:

first to third or from third to first speed positions, as by allowing the vehicle speed to accelerate or decelerate respectively, between low.

speed and running speed before disengaging the clutch.

While the governor actuated switch is in control of the gear-shifter mechanism, it may be desired to operate the vehicle in reverse. Accordingly, the interlock switch 2530. must be actuated first, in the manner heretofore described, to reconnect the manual switch 92 in the control circuit. Thereafter, shifting of the transmission gearing into reverse may be effected by the manual switch, as before described.

Fig. 22 illustrates a preferred form of battery switch which is adapted for operation by the foot accelerator l9, this switch when utilized, replacing the clutch-pedal actuated switch 28! shown in detail by Fig. 6. The switch elements thereof are carried by a housing 366 of insulating material which may be cylindrical in form and provid'ed with a closure 36| at one end and a flange 362 at the opposite end. The housing is inserted though the foot board 22 and is secued thereto through its flange 362, as by screws 363. The location of the housing is such that its axis is in register with the foot accelerator IS. A centrally bored plug 364 is secured in the flanged end of the housing, and slidably seated in the bore is a push-rod 365 which extends upwardly beyond the housing and into abutting engagement with the accelerator 19. The opposite end of the rod which is directed inwardly of the housing, supports a block or disc 366 which slidably engages the inner Wall surface of the cylinder. The disc is biased upwardly against the plug by a suitable compression spring 361 which bears at one end against the disc and at its opposite end, against the bottom closure 36l. Thus through the spring and disc, the upper end of rod 365 is maintained in engagement with the accelerator, so as to follow accelerator movement during its actuation.

Contacts 368 and 369 are carried by and extend through diametrally opposite wall portions of the housing adjacent the plug 364, while carried by the disc 366 is a contact bridging element or bar 316, the bar being by preference, embedded in the disc as shown. The arrangement of the switch parts is such that the contacts 368369 are bridged by bar 316 when the disc abuts the plu 364. In associating this switch with the control circuit of Fig. 21, the switch replaces switch 28l and the battery conductor 292 may be connected directly to the contact 268 and the lead 293 to the opposite contact 369.

The function of the accelerator-operated switch is similar to that of the clutch-actuated switch 28l, closure of the former being effected when the accelerator pedal is released to reduce the engine fuel feed to a minimum, as is generally the practice preparatory to shifting from one transmission speed-drive to another, while closure of the latter is effected upon disengagement tional movement, or torque, to the eccentrics.

It is further seen that the outer Winding of the operator, serves essentially as the winding of a solenoid or electromagnet structure, the armature or core of which consists of the inner wound elements which of themselves, when energized, produce the torque efiect. Thus the operator constitutes, in'effect, a combined electric motor and solenoid, and serves, with the motion translating elements, to provide a compound control movement available for the control-actuation of many types of apparatus. As applied to a standard three speed and reverse type of transmission, the control operator, as will have appeared, enables a reciprocal control movement in either of two spaced planes, and in a plane intersecting the two spaced planes-otherwise described in the particular example as capable of effecting control movement in an H shaped path.

From the foregoing description of the improved control assembly as applied to transmission gearshifter mechanism, together with a preferred control circuit arrangement therefor, it will appear that the present invention provides an emcient and positively functioning means for effecting a variety of control movements or a series of related control actuations, as in the speedchange control of power transmission gearing. Moreover, the apparatus comprising the electromagnetic operator is compactly arranged and of unit form, being adapted to a ready and advantageous operative association with transmission assemblies as used in prevailing types of automotive vehicles and the like.

It is to be understood of course, that since the present disclosure relates only to a preferred selected embodiment of the invention, alterations or modifications in the parts or in the operative association thereof, may be made without departing from the spirit and scope of the invention as defined by the appended claims.

I claim:

1. An electromagnetic gear-shifting device, comprising a plurality of nested and coaxially arranged electromagnetic members capable of axial displacement as a unit, one thereof being adapt ed for angular displacement relative to another,

energizing windings functionally associated with said members, and switch means in circuit controlling relation to said windings, operation of said switch means serving to effect energization of one of said windings to cause axial displacement of said members as a unit, and to effect energization of others of said windings to cause angular displacement of said one member.

2. The subject of claim 1 wherein the switch means includes a switch operated in response to axial displacement of the electromagnetic members, for effecting energization of others of said windings to cause angular displacement of said one member.

3. An electromagnetic gear-shifting mechanism comprising a pair of concentrically related, electromagnetic members axially displaceable as a unit, one thereof being capable of rotary movement relative to the other, energizing windings functionally associated with said members, certain thereof being carried by said members, a switch in circuit-controlling relation to said windings, and a second switch in circuit controlling relation to one of said windings and operated in response to axial displacement of said members, said first switch being operable to effect energization of certain of said windings to cause axial displacement of said members as a unit, and said second switch operated in response to said displacement of the members, and serving to effect energization of said one winding to cause rotational displacement of said one of the electromagnetic members.

4. In combination with a speed-change powertransmission assembly provided with an element operable to effect speed-ratio changes, a device of electromagnetic type for actuating said element, the device comprising cooperating electromagnetic members and a frame structure common to said members, the members being arranged for linear displacement longitudinally thereof, one of said members being adapted for angular displacement relative to another, and to the frame, means operatively connecting said members to said transmission element, and exciter means functionally associated with said members, operable to effect energization of said membersto cause both linear displacement of said members and angular displacement of said one member.

5. In combination with a power transmission assembly of a multi-speed-ratio type, provided with an element operable to effect speed-ratio changes in said transmission, a device of electromagnetic type for actuating said element, the device comprising coaxially related electromagnetic members adapted for axial displacement as a unit, one thereof being adapted for angular displacement relative to another, operating means connecting said members to said transmission element, a field winding associated with said members, an exciter winding carried on each of said members, control means in circuit with said field winding and operable to effect energization thereof for causing axial displacement of said members as a unit, and control means in circuit with one of said exciter windings, operable in response to axial displacement of said members to effect energization of said winding for causing angular displacement of said one member.

6. In a transmission speed-ratio control system for transmission assemblies of multi-speedratio type, an electromagnetically operated speed changing device comprising a pair of concentrically related electromagnet members arranged for axial displacement as a unit, solenoid windings arranged to effect such axial displacement, one of the electromagnet members being adapted for angular displacement relative to the other, energizing windings for said members, and operating circuits for said windings, including a switch adapted for facultative actuation to effect energization of certain of said windings, whereby to cause an initial axial displacement of said members and an initial angular displacement of said one member.

7. In a control device for a speed-change power transmission drive assembly, an electromagnetically operated device comprising a pair of concentrically related electromagnet members arranged for axial displacement as a unit, one thereof being adapted for angular displacement relative to the other, means operatively connecting said members to the transmission assembly in a manner to utilize said displacement movements of the members for effecting speed-ratio changes in the transmissiona winding functionally associated with said members, serving when energized to cause axial displacement of the members as a unit, windings on said members arranged to effect when energized, angular displacement of said member susceptible thereof, and control means in circuit with said windings for controlling, energizaticn thereof, said control means including a manually actuable switch, a switch operable responsively to the speed of said transmission drive assembly, and means in circuit with said switches operable for selecting either switch for controlling energization of the windings.

8. In combination with a speed-change power transmission assembly for automotive vehicles and the like, mechanism of electromagnetic type, operatively associated with the transmission assembly for effecting speed-ratio changes therein, the mechanism comprising magnetic members capable of axial displacement as a unit, one thereof being adapted for angular displacement relative to another, energizing windings functionally associated with said members, one thereof adapted to cause when energized, axial displacement of said members as a unit, others of said windings being adapted to cause when energized, angular displacement of said one member, energizing circuits for said windings, including a manually operated control switch and a vehicle operated control switch in parallel circuit relation, and a selector switch operable to connect eitherof-said control switches to said energizing circuits, to the exclusion of the other, whereby the selected control switch is adapted to influence the energizing circuits to effect energization of said windings.

9. An electromagnetic gear-change mechanism, comprising a pair of coaxially related electromagnetic members adapted for axial displacement as a unit, one thereof being adapted for angular displacement relative to the other, a field winding structure functionally associated with said members, and including a plurality of serially connected field coils, exciter windings on said members, and energizing circuits for said coils and exciter windings including control switches, one of said switches being arranged for controlling selectively, energization of said field coils in a manner to cause axial displacement of said members as a unit, and another of said switches being arranged for controlling energization of one of said exciter windings to cause angular displacement of said one member.

10. In an electromagnetic operator for speedchange transmission assembly, an element arranged for movement into a plurality of control positions to efiect changes in transmission speed ratio, an electromagnetic assembly including a motor provided with a rotor adapted for at least partial rotation, and electromagnetic means for axially displacing the motor as a unit, the motor being operatively associated with said control element, switching and circuit means adapted to permit energization of the motor'and the axial displacing means, for selectively actuating said control element into its several control positions, and switching means operable responsively to a defined extent of movement of the motor and a defined extent of movement of the axial displacing means, for limiting the range of movement of said motor and means, with respect to the several control positions attainable by actuation of the control device.

11. An electromagnetic gear shifting mechanism in operative association with speed change apparatus, the mechanism including a plurality of wound elements characterized by defined axes, the elements being coaxially arranged and at least two thereof constituting a unit adapted for movement relative to a third one of said elements, in an axial direction, upon predetermined energization, at least one of the elements of said unit being adapted for energization to eifect an angular displacement of the other thereof, and means for translating the movement of the elements of said unit, to speed change apparatus to be controlled by the mechanism.

12. In a gear shifting mechanism of electromagnetic type, in operative association with a speed change transmission, two windings, a core for each of the windings forming therewith a wound element, one of the elements extended within the other, the mechanism including a separate wound element adapted for electrical energization in a manner selectively to cause a translatory movement of one of the first said wound elements, one of the first said elements being adapted for energization to cause relative angulardisplacement of the first said ele ent and means for translating said movements of the first said elements to a speed change transmission to be controlled thereby.

13. In an electromagnetic gear shifting device, Y

to said one of the electromagnetic elements, and

means for selectively energizing the windings, to effect in sequence, translatory and rotational movements of said one of the electromagnetic elements, whereby to cause a corresponding sequential pivotal and axial displacement movement of the control member.

14. An electromagnetic gear-shift operator in operative association with speed change apparatus, said operator including a plurality of wound elements arranged one within another, and arranged for relative translatory movement, in either of two directions upon predetermined energization, at least two of said wound elements being arranged for relative angular displacing movement, upon predetermined energization thereof, and means for transmitting said movements to speed-change apparatus to be controlled.

15. In an electromagnetic gear shifting mechanism, a frame structure, and a combined motor and electromagnet, including separate motor and magnet windings having a common armature and rotor structure disposed in said frame.

16. In an electromagnetic gear shifting mechanism adapted for operative association with a speed-change apparatus, a motor including a rotor capable of limited axial displacement, and auxiliary windings, adapted upon energization, to cause axial displacement of the rotor, and means for translating the rotary and displacement movements of the rotor, for purposes of control of the associated speed-change apparatus.

' 17. In an electromagnetic gear shifting device, in operative association with a speed change transmission, a solenoid assembly including at least two armature elements adapted to occupy any of a plurality of axial positions, and windings associated with the armature elements, for effecting rotation of one of said armature elements, while the armatures and means including a shiftable member actuated by said armature elements, are in any of said axial positions for connecting said armature elements to the speed change transmission for control actuation.

18. An electromagnetic gear shifting mechanism in operative association with a speed change transmission, a solenoid including windings and an armature structure, the armature structure comprising a torque-producing motor, means for selectively energizing the solenoid and the motor, and means including an operative connection between the solenoid and transmission, for translating selectively, the movements of the solenoid and the motor, for effecting control actuation of the associated speed change transmission.

19. An electromagnetic speed change or gear shifting device, the electromagnetic device including a field structure, a rotor structure adapted for partial rotation responsively to predetermined energization of said field structure, at least one of said structures being capable of limited axial displacement, and awiliary windings cooperating with the axially displaceable structure to cause axial displacement thereof,

upon predetermined energization of said auxiliary windings.

20. An electromagnetic gear shifting mechanism in operative association with a speed-change transmission, said mechanism including a frame, three coaxially arranged, wound structures associated with the frame, two of said structures being related in torque-producing relation, and the third structure related as a solenoid winding, coacting with at least one of the other structures as an armature, a slidable support for the last said wound structure, such that it is adapted for a limited linear movement and means for translating the movements resulting from the selective energization of said wound structures, to the speed-change transmission controlled by the mechanism.

21. An electromagnetic speed-change control device in combination with a speed change transmission, adapted to effect a compound movement and impart same to the speed change transmission to be controlled by the device, three coaxially arranged, wound structures, two of said structures being related in torque-producing relation, the third structure being disposed as a solenoid winding, coacting with at least one of the other structures as an armature to effect a linear movement, and means for translating to the transmission, the compound movement efiected by the torque-related windings in coaction with the solenoid winding.

2 In an electromagnetic operator in combination with a speed-change transmission assembly having a control element arranged for movement into a plurality of control positions H to effect changes in transmission speed ratio, an electromagnetic device including a plurality of coaxially arranged wound elements, an actuating member connected to one of said wound elements and operatively associated with the control element, switching and circuit means adapted to permit energization of selected wound elements of said device for selectively imparting to said one of said wound elements and the actuating member connected thereto, an axial and an angular movement, and thereby adapted for selectively actuating said control element into its several control positions, and switching means operable responsively to movements of the said control element, for limiting its range of movement with respect to its several control positions.

23. In an electromagnetic operator for attachment to a speed-change transmission assembly, a member arranged for movement into a plurality of control positions to efi'ect changes in transmission speed ratio, an electromagnetic device including a plurality of wound elements disposed one within another, means operatively connecting certain of the wound elements with the control member, switching and circuit means adapted to permit energization of the selected wound elements of said device for selectively imparting to one of the Wound elements, an axial and an angular movement, whereby the device is adapted through said connecting means, for selectively actuating said control member into its several control positions, and switching means operable responsively to movement of said control member, for controlling the operation of said device to limit the range of movement of said control member with respect to its several control positions.

EUGENE S. BUSH. 

